package com.zoran.study.spring.service;

/**
 * UserService
 *
 * @author zouxm
 * @date 2018/1/7
 */
public interface UserService {

    void showMsg();

    int eval(int a, int b);

    String calc(int a, int b);

    static void test() {
        System.out.println("static method invoke...");
    }

}
